Received: 7 January 2016
Accepted: 29 January 2018
First Online: 12 February 2018
Ethics approval and consent to participate
: The study protocol was approved by the Ethics Committee of the “Mater Domini” Hospital of Catanzaro (Italy) (15/12/2011).Written informed consent to participate in the study has been obtained from all participants.
: Not applicable, as the manuscript does not contain any individually identifiable person’s data.
: The authors declare that they have no competing interests.
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